:root { color-scheme: light dark; --fg:#1f2937; --muted:#64748b; --bg:#f8fafc; --card:#ffffff; --accent:#2563eb; }
@media (prefers-color-scheme: dark) { :root { --fg:#e5e7eb; --muted:#94a3b8; --bg:#0f172a; --card:#111827; --accent:#60a5fa; } }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, sans-serif; color: var(--fg); background: var(--bg); line-height: 1.55; }
main { max-width: 860px; margin: 0 auto; padding: 48px 22px; }
header { margin-bottom: 32px; }
h1 { font-size: clamp(2rem, 6vw, 4rem); line-height: 1; margin: 0 0 12px; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid rgba(148,163,184,.25); border-radius: 18px; padding: 22px; margin: 18px 0; box-shadow: 0 10px 30px rgba(15,23,42,.06); }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
small, .muted { color: var(--muted); }